spring-loaded GetMethodLookup 源码
spring-loaded GetMethodLookup 代码
文件路径：/springloaded/src/main/java/org/springsource/loaded/ri/GetMethodLookup.java
/*
* Copyright 2010-2012 VMware and contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springsource.loaded.ri;
import java.lang.reflect.Modifier;
import org.springsource.loaded.Utils;
/**
* Implements a 'lookup' strategy that finds methods in the fashion required by java.lang.Class.getMethod
*
* @author Kris De Volder
* @since 0.5.0
*/
public class GetMethodLookup {
private String name;
private String paramsDescriptor;
/*
* Create an object capable of performing the lookup
*/
public GetMethodLookup(String name, String paramsDescriptor) {
this.name = name;
this.paramsDescriptor = paramsDescriptor;
}
public GetMethodLookup(String name, Class<?>[] params) {
this(name, Utils.toParamDescriptor(params));
}
public Invoker lookup(MethodProvider methodProvider) {
Invoker method = methodProvider.getDeclaredMethod(name, paramsDescriptor);
if (method != null && Modifier.isPublic(method.getModifiers())) {
return method;
}
// Try the superclass context (but not for interfaces, we aren't supposed to include Object's methods
// in them!
if (!methodProvider.isInterface()) {
MethodProvider parent = methodProvider.getSuper();
if (parent != null) {
method = lookup(parent);
if (method != null) {
return method;
}
}
}
// Try the interfaces
MethodProvider[] itfs = methodProvider.getInterfaces();
for (MethodProvider itf : itfs) {
Invoker itfMethod = lookup(itf);
if (itfMethod != null) {
return itfMethod;
}
}
return null;
}
}
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